How severe is CVE-2021-25863?

CVE-2021-25863 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25863 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25863?

CVE-2021-25863 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25863?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-25863 published?

CVE-2021-25863 was published on 2021-01-26 and last updated on 2026-06-17.

CVE-2021-25863

CVE-2021-25863 is a high-severity vulnerability in Open5gs with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 8.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Open5gs
Published: 2021-01-26
Last modified: 2026-06-17

Description

Open5GS 2.1.3 listens on 0.0.0.0:3000 and has a default password of 1423 for the admin account.

Frequently asked questions

What is CVE-2021-25863?: Open5GS 2.1.3 listens on 0.0.0.0:3000 and has a default password of 1423 for the admin account.
How severe is CVE-2021-25863?: CVE-2021-25863 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25863?: CVE-2021-25863 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-25863 published?: CVE-2021-25863 was published on 2021-01-26 and last updated on 2026-06-17.

References

https://github.com/open5gs/open5gs/issues/764

Affected products (1)

cpe:2.3:a:open5gs:open5gs:2.1.3:*:*:*:*:*:*:*

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